For a SPARC system, type: fwupdate check sysfw
For an x86 system, type: fwupdate check sp_bios
The following is sample output from this command:
# fwupdate check sysfw ERROR: The installed System Firmware or ILOM version is not the latest available. You must update it to obtain the latest security and other fixes.
If you are required to update your system firmware, download the latest patch. See Downloading Firmware Patches.